Activity Patterns

Cathemeral

Active at irregular intervals day or night

1,358 Animals

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Black Aphids

Tiny bugs, huge plant impact

Tiktaalik

The Arctic "fishapod" in transition

Sandworm

Bristle worms: engineers of the seafloor

Therizinosaurus

Scythe-clawed plant-eater theropod

Liopleurodon

Jurassic seas' power-jawed predator

Stromatolite

Rocks built by microbes, for eons

Disco Clam

Reef crevice clam with a strobe show

Eelpout

Cold seas, long fins, deep lives

Titanosaur

Cretaceous giants, sometimes armored

Blowfly

Nature's cleanup crew in metallic armor

Lake Trout

Deep-lake char, built for the cold

Black Bass

Built for the strike, born to guard

Black-Tailed Rattlesnake

Dark tail. Quiet ambush. Rattle ready.

Pygmy Rattlesnake

Tiny rattle, vital predator